[Elecraft] Understanding the KX3 Block Diagram

[Wayne Burdick]

Also keep in mind those roofing filters. This is a substantial  
departure from other SDRs. Wasn't easy, either :)

Wayne

On Mar 7, 2012, at 8:17 PM, Matt Maguire wrote:

> Here is a presentation by G8VOI which talks about some of the  
> concepts used in radios like the KX3.
> http://www.pe0fko.nl/g8voi/SDR_1.pdf
>
> The presentation uses a softrock radio as a concrete example, so  
> where the presentation talks about PCs and soundcards, keep in mind  
> that for the KX3 this corresponds to the A/D & D/A convertors and  
> DSP/microcontroller that are built into the KX3 itself.
>
> 73, Matt VK2ACL.
>
>
> On 08/03/2012, at 2:19 PM, David Stratton wrote:
>
>> Hoping that I may not be the only Ham puzzled by the block diagram  
>> of the
>> KX3 I am asking that someone please explain it because it is so  
>> different
>> from the superheterodyne radio concept I have become accustomed to in
>> current amateur radios. I understand direct conversion radios but  
>> what is
>> all the stuff that's there besides the mixer-oscillator and audio  
>> amplifier
>> needed by a direct conversion radio? It seems to me the KX3 block  
>> diagram
>> looks a lot like radios put forth some time ago by Rick Campell  
>> KK7B. Pardon
>> my saying so but the KX3 radio looks like it has a weak front end  
>> and a
>> heavy back end that hopes to make up for the weak front end!
>>
>> Dave - KO4KL
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html